TN Michigan, LLC

TN Michigan, LLC (trading as TN Plastics) is a precision contract injection molding and engineered plastic components manufacturer headquartered in Sault Sainte Marie, Michigan. Operating since 1913 (originally as Hoover Steel Ball), the company specializes in ISO 13485 and FDA-registered medical-grade plastic manufacturing. Core capabilities include cleanroom injection molding (Class 6–8 compliant), precision plastic balls and beads, and custom injection-molded components for medical diagnostics, surgical instruments, and point-of-care devices. The company serves medical OEMs, technology and robotics sectors, fluid dispensing applications, and industrial manufacturing. TN Plastics maintains certifications in ISO 9001, ISO 13485 (Medical Devices), and ISO 14001 (Environmental Management), with FDA registration for medical device manufacturing. The facility is equipped for advanced mold design, 3D CAD simulation, and automation integration. Recent expansion includes acquisition of Rispa (2023) and capacity growth in Italy (2025), enabling multi-national injection molding across North America and Europe. The company is part of the Tsubaki Nakashima global network and holds partnerships with top 10 medical OEMs worldwide. Services include contract manufacturing, mold building, automation design, and access to specialty materials through strategic alliances.